Abstract
A study was conducted with sunflower plants (Helianthus annuus, L.) cv. Peredovik in field experiments, one of which included 9 NPK-fertilizer treatments. The intensity of uptake,i.e. the quantity (mg) of nutrient taken up for the accumulation of 1 g dry matter/day, the concentrations of all essential elements in the plant organ tissues and their distribution among above-ground organs, by stages of development, were investigated. The results have revealed the inherent physiological system responsible for the uptake intensity of individual elements, as well as the simultaneous uptake and distribution of all essential elements of the root nutrition by the shoots, throughout the life cycle of the plant.
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Mitreva, N.I. Physiological interaction model of sunflower plant with its nutrient medium during ontogenesis. Plant Soil 115, 23–28 (1989). https://doi.org/10.1007/BF02220690
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DOI: https://doi.org/10.1007/BF02220690